/**
 * 发展历程
 * @author xiaoqiang <465633678@qq.com>
 * @created 2019/09/09 17:17:32
 */
.l-course__header {
  color: #424040;
  font-size: 28px;
  line-height: 28px;
  display: block;
  padding: 62px 0 80px;
  text-align: center;
}
.l-course__timerange {
  position: relative;
}
.l-course__timerange__wrapper {
  overflow: hidden;
  display: block;
  position: relative;
  height: 130px;
  width: 1046px;
  margin: 0 auto;
}
.l-course__timerange__wrapper::before {
  border-bottom: 1px solid #e1e1e1;
  position: absolute;
  content: '';
  left: 0;
  right: 0;
  bottom: 30px;
}
.l-course__timerange__list {
  position: absolute;
  padding-top: 10px !important;
  height: 130px !important;
  left: 0;
  width: 9990px;
  overflow: hidden;
  bottom: 0;
  top: 0;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}
.l-course__timerange__item {
  width: 208px;
  height: 100%;
  float: left;
}
.l-course__timerange__item > a {
  display: block;
  position: relative;
  text-align: center;
}
.l-course__timerange__item > a span {
  font-size: 22px;
  line-height: 22px;
  color: #535353;
  display: block;
  padding-bottom: 54px;
  -webkit-transition: all 0.5s ease;
  transition: all 0.5s ease;
}
.l-course__timerange__item > a::before {
  background: url() no-repeat left top / contain;
  width: 43px;
  height: 65px;
  content: '';
  position: absolute;
  display: none;
  bottom: -17px;
  left: 50%;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
}
.l-course__timerange__item > a::after {
  width: 27px;
  height: 27px;
  background-color: #dcdedd;
  border-radius: 50%;
  display: block;
  content: '';
  margin: 0 auto;
  -webkit-transition: all 0.5s ease;
  transition: all 0.5s ease;
}
.l-course__timerange__item > a:hover {
  /* stylelint-disable no-descending-specificity*/
}
.l-course__timerange__item > a:hover span {
  color: #1153a1;
}
.l-course__timerange__item > a:hover::after {
  background-color: #1153a1;
}
.l-course__timerange__item--active > a span {
  color: #2066a7;
  -webkit-transform: scale(1.2, 1.2);
          transform: scale(1.2, 1.2);
}
.l-course__timerange__item--active > a::before {
  display: block !important;
}
.l-course__timerange__tab__item {
  width: 41px;
  height: 41px;
  position: absolute;
  bottom: 12px;
  cursor: pointer;
}
.l-course__timerange__tab__item--left {
  left: 0;
  background: url() no-repeat left top / contain;
}
.l-course__timerange__tab__item--right {
  background: url() no-repeat left top / contain;
  -webkit-transform: rotateZ(180deg);
          transform: rotateZ(180deg);
  right: 0;
}
.l-course__content {
  margin-top: 94px;
  margin-bottom: 84px;
  background-color: #f9f9f9;
  padding: 80px 0 80px 229px;
  position: relative;
}
.l-course__content::before {
  content: '';
  display: block;
  position: absolute;
  border-left: 2px solid #f3f1f1;
  left: 392px;
  top: 80px;
  bottom: 80px;
  height: auto;
}
.l-course__content__year {
  font-size: 42px;
  color: #000;
  font-weight: bold;
  float: left;
  /* stylelint-disable */
}
.l-course__content__year span {
  font-size: 14px;
  margin-left: 4px;
}
.l-course__content__main {
  float: left;
  padding-left: 108px;
  width: 660px;
  line-height: 1.5;
}

